CN202652374U - Television and mute auxiliary control circuit thereof - Google Patents
Television and mute auxiliary control circuit thereof Download PDFInfo
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- CN202652374U CN202652374U CN 201220165606 CN201220165606U CN202652374U CN 202652374 U CN202652374 U CN 202652374U CN 201220165606 CN201220165606 CN 201220165606 CN 201220165606 U CN201220165606 U CN 201220165606U CN 202652374 U CN202652374 U CN 202652374U
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Abstract
The utility model is suitable for the technical field of television control, provides a television and a mute auxiliary control circuit thereof. In the utility model, the mute auxiliary control circuit comprising a first mute control signal generating unit and a second mute control signal generating unit is used for realizing the mute function to realize the mute control of a speaker power amplification circuit and an earphone operation amplification circuit when the television is powered up and powered down, and normally works and a user needs the mute function, and the structure of the whole mute auxiliary control circuit is simple, and the cost is effectively reduced, therefore the problems of the prior art that the circuit structure o the mute circuit is complicated and the cost is high, are solved.
Description
Technical field
The utility model belongs to the television set control field, relates in particular to a kind of television set and quiet auxiliary control circuit thereof.
Background technology
At present, television set power on and quiet control during power down aspect, a kind of mute circuit that prior art adopts is when system for TV set powers on, by one road RC charging circuit loud speaker power amplifier and the earphone discharge circuit of television set are realized quiet control, and when the system for TV set power down, by one road RC discharge circuit loud speaker power amplifier and the earphone discharge circuit of television set are realized quiet control again.
Yet, because the mute circuit complex structure that above-mentioned prior art provides, and need to adopt two electric capacity with high capacitance, thereby the cost of whole mute circuit is increased.Therefore, the mute circuit that provides of prior art exists circuit structure complexity and the high problem of cost.
The utility model content
The utility model provides a kind of quiet auxiliary control circuit of television set, is intended to solve the existing circuit structure complexity of mute circuit and the high problem of cost that prior art provides.
The utility model is achieved in that a kind of quiet auxiliary control circuit of television set, is connected with main control chip, loud speaker power amplifier, earphone discharge circuit and the DC power supply of television set, and described quiet auxiliary control circuit comprises:
The output of the described DC power supply of power supply termination, output is connected with the quiet control end of described loud speaker power amplifier and the quiet control end of described earphone discharge circuit simultaneously, generates the first quiet control signal generation unit of quiet control signal when television set powers on power down;
The output of the described DC power supply of power supply termination, input is connected with the universaling I/O port of described main control chip and the input of the described first quiet control signal generation unit respectively with output, when television set works, generate the second quiet control signal generation unit of corresponding quiet control signal according to the level signal of described main control chip output.
Another purpose of the present utility model also is to provide a kind of television set, described television set comprises main control chip, loud speaker power amplifier, earphone discharge circuit, DC power supply and quiet auxiliary control circuit, described quiet auxiliary control circuit is connected with described main control chip, described loud speaker power amplifier, described earphone discharge circuit and described DC power supply, and described quiet auxiliary control circuit comprises:
The output of the described DC power supply of power supply termination, output is connected with the quiet control end of described loud speaker power amplifier and the quiet control end of described earphone discharge circuit simultaneously, generates the first quiet control signal generation unit of quiet control signal when television set powers on power down;
The output of the described DC power supply of power supply termination, input is connected with the universaling I/O port of described main control chip and the input of the described first quiet control signal generation unit respectively with output, when television set works, generate the second quiet control signal generation unit of corresponding quiet control signal according to the level signal of described main control chip output.
In the utility model, the quiet auxiliary control circuit that comprises the described first quiet control signal generation unit and the described second quiet control signal generation unit by employing, can power at television set, when power down and television set normal operation and user need to realize mute function, stably the output mute control signal is with the quiet control of realization to described loud speaker power amplifier and described earphone discharge circuit, and the circuit structure of whole quiet auxiliary control circuit is simple, effectively reduce cost, thereby solved the existing circuit structure complexity of mute circuit and the high problem of cost that prior art provides.
Description of drawings
Fig. 1 is the modular structure figure of the quiet auxiliary control circuit that provides of the utility model the first embodiment;
Fig. 2 is the exemplary circuit structure chart of the quiet auxiliary control circuit that provides of the utility model the second embodiment;
Fig. 3 is the exemplary circuit structure chart of the quiet auxiliary control circuit that provides of the utility model the 3rd embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
In the utility model embodiment, the quiet auxiliary control circuit that comprises the first quiet control signal generation unit and the second quiet control signal generation unit by employing, can power at television set, when the normal operation of power down and television set and user need to realize mute function, stably the output mute control signal is with the quiet control of realization to loud speaker power amplifier and earphone discharge circuit, and the circuit structure of whole quiet auxiliary control circuit is simple, has effectively reduced cost.
Below in conjunction with specific embodiment specific implementation of the present utility model is described in detail:
Embodiment one:
Fig. 1 shows the modular structure of the quiet auxiliary control circuit that the utility model the first embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model the first embodiment, and details are as follows:
The quiet auxiliary control circuit 100 of television set is connected with main control chip 200, loud speaker power amplifier 300, earphone discharge circuit 400 and the DC power supply 500 of television set, and quiet auxiliary control circuit 100 comprises:
The output of power supply termination DC power supply 500, output is connected with the quiet control end of loud speaker power amplifier 300 and the quiet control end of earphone discharge circuit 400 simultaneously, generates the first quiet control signal generation unit 101 of quiet control signal when television set powers on power down;
The output of power supply termination DC power supply 500, input is connected with the universaling I/O port of main control chip 200 and the input of the first quiet control signal generation unit 101 respectively with output, when television set works, generate the second quiet control signal generation unit 102 of corresponding quiet control signal according to the level signal of main control chip 200 outputs.
Embodiment two:
Fig. 2 shows the exemplary circuit structure of the quiet auxiliary control circuit that the utility model the second embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model the second embodiment, and details are as follows:
As the utility model one embodiment, the first quiet control signal generation unit 101 comprises:
Resistance R 1, positive-negative-positive triode Q1, storage capacitor C1, diode D1, diode D2, resistance R 2, resistance R 3, resistance R 4 and NPN type triode Q2;
The first end of resistance R 1 is the power end of the first quiet control signal generation unit 101, the first end of the base stage connecting resistance R1 of positive-negative-positive triode Q1, the emitter of positive-negative-positive triode Q1 and the second end of resistance R 1 are connected to the positive pole of storage capacitor C1 altogether, the negative electrode of the negative pole of storage capacitor C1 and diode D1 is connected to the anode of diode D2 altogether, the plus earth of diode D1, the negative electrode of diode D2 is the input of the first quiet control signal generation unit 101, resistance R 2 is connected between the negative electrode of the collector electrode of positive-negative-positive triode Q1 and diode D2, the base stage of NPN type triode Q2 is connected with the negative electrode of diode D2 and the first end of resistance R 3 simultaneously, the second end ground connection of resistance R 3, the grounded emitter of NPN type triode Q2, the current collection of NPN type triode Q2 is the output of the first quiet control signal generation unit 101 very, and resistance R 4 is connected between the collector electrode of the first end of resistance R 1 and NPN type triode Q2.
As the utility model one embodiment, the second quiet control signal generation unit 102 comprises:
Resistance R 5, storage capacitor C2, NPN type triode Q3, resistance R 6 and diode D3;
The first end of resistance R 5 is the input of the second quiet control signal generation unit 102, the second end of resistance R 5 and the positive pole of storage capacitor C2 are connected to the base stage of NPN type triode Q3 altogether, the equal ground connection of emitter of the negative pole of storage capacitor C2 and NPN type triode Q3, the collector electrode of NPN type triode Q3 is connected with the first end of resistance R 6 and the anode of diode D3 simultaneously, and the second end of resistance R 6 and the negative electrode of diode D3 are respectively power end and the output of the second quiet control signal generation unit 102.
In the present embodiment, the quiet control end of loud speaker power amplifier 300 and earphone discharge circuit 400 quiet control ends all need by low level as quiet control signal to trigger mute function.
Below in conjunction with operation principle quiet auxiliary control circuit is described further:
When the system for TV set start powers on, the level signal that the universaling I/O port of main control chip 200 is exported is unstable, then the negative electrode of diode D3 can't be exported effective high level driving N PN type triode Q2 conducting, so, the direct current that DC power supply 500 is exported after powering on charges by 1 couple of storage capacitor C1 of resistance R, simultaneously, direct current can be by the negative electrode output of diode D2, and by providing base bias voltage for NPN type triode Q2 after resistance R 3 dividing potential drops, then NPN type triode Q2 conducting, and draw electric current so that its collector electrode becomes electronegative potential by high potential from resistance R 4, then the collector electrode of NPN type triode Q2 is exported a low level and is made loud speaker power amplifier 300 and earphone discharge circuit 400 all enter mute state as quiet control signal, sends the impulsive sound that powers on to avoid loud speaker and earphone.C1 constantly charges along with storage capacitor, the direct current that flow to the base stage of NPN type triode Q2 from diode D2 can constantly reduce, when storage capacitor C1 charging is finished, the base voltage of NPN type triode Q2 is because ending less than its bias voltage, this moment, the collector electrode of NPN type triode Q2 became high potential by electronegative potential, then the quiet control end of the quiet control end of loud speaker power amplifier 300 and earphone discharge circuit 400 all obtains high level and cancels mute function from the collector electrode of NPN type triode Q2, at this moment, television set powers on to start shooting and finishes, and system for TV set begins to enter normal operating conditions.
When system for TV set works, if the user inputs quiet triggering command, then main control chip 200 can be exported a low level from its universaling I/O port, this low level enters the base stage of NPN type triode Q3 by resistance R 5, NPN type triode Q3 cut-off, the direct current of DC power supply 500 outputs exports the base stage of NPN type triode Q2 to by resistance R 6 and diode D3, so, the Q2 conducting of NPN type triode and its collector electrode draw electric current from resistance R 4, and then the collector electrode of NPN type triode Q2 is exported a low level and made loud speaker power amplifier 300 and earphone discharge circuit 400 all enter mute state as quiet control signal; If the user inputs quiet cancel an order, then main control chip 200 can be exported a high level from its universaling I/O port, this high level enters the base stage of NPN type triode Q3 by resistance R 5, the Q3 conducting of NPN type triode is also drawn electric current by its collector electrode from the first end of resistance R 6, this moment, diode D3 output low level made NPN type triode Q2 cut-off, resistance R 4 directly is introduced into the direct current of DC power supply 500 outputs the collector electrode of NPN type triode Q2, thereby make the collector electrode output high level of NPN type triode Q2 to cancel the mute function of loud speaker power amplifier 300 and earphone discharge circuit 400, stop quiet.
When system for TV set shutdown power down, the level signal that the universaling I/O port of main control chip 200 is exported is unstable, then the negative electrode of diode D3 can't be exported effective high level driving N PN type triode Q2 conducting, and DC power supply 500 stops output DC, positive-negative-positive triode Q1 conducting this moment, storage capacitor C1 begins discharge, electric current flow to the base stage of NPN type triode Q2 by positive-negative-positive triode Q1 and resistance R 2, the Q2 conducting of NPN type triode and its collector electrode are exported a low level makes loud speaker power amplifier 300 and earphone discharge circuit 400 all enter mute state as quiet control signal, sends the power down impulsive sound to avoid loud speaker and earphone.Iterative method along with storage capacitor C1 discharge process, two pole tensions of storage capacitor C1 can progressively reduce, the electric current that then flow to the base stage of NPN type triode Q2 by resistance R 2 also can progressively reduce, when storage capacitor C1 discharge finishes, NPN type triode Q2 cut-off, this moment, the collector electrode of NPN type triode Q2 kept electronegative potential because DC power supply 500 is exported without direct current, and then resistance R 4 no currents pass through.
In the present embodiment, select the storage capacitor C1 with certain capacitance and the resistance R 1 with specific resistance according to the power-up initializing time of main control chip 200, thereby make the charging interval of storage capacitor C1 and the power-up initializing time consistency of main control chip 200, guarantee the impulsive sound that powers on is realized comprehensively shielding, and also need simultaneously according to selecting the resistance R 2 with specific resistance the discharge time of storage capacitor C1, in order to can realize comprehensively shielding to the power down impulsive sound at storage capacitor C1 interdischarge interval.
Embodiment three:
Fig. 3 shows the exemplary circuit structure of the quiet auxiliary control circuit that the utility model the 3rd embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model the 3rd embodiment, and details are as follows:
As the utility model one embodiment, the first quiet control signal generation unit 101 comprises:
Resistance R 7, positive-negative-positive triode Q4, storage capacitor C3, diode D4, diode D5, resistance R 8 and resistance R 9;
The first end of resistance R 7 is the power end of the first quiet control signal generation unit 101, the first end of the base stage connecting resistance R7 of positive-negative-positive triode Q4, the emitter of positive-negative-positive triode Q4 and the second end of resistance R 7 are connected to the positive pole of storage capacitor C3 altogether, the negative electrode of the negative pole of storage capacitor C3 and diode D4 is connected to the anode of diode D5 altogether, the plus earth of diode D4, the negative electrode of diode D5 is the input of the first quiet control signal generation unit 101, resistance R 8 is connected between the negative electrode of the collector electrode of positive-negative-positive triode Q4 and diode D4, the first end of resistance R 9 is the output of the first quiet control signal generation unit 101 and links to each other the second end ground connection of resistance R 9 with the negative electrode of diode D5.
In the present embodiment, the circuit structure that provides among the circuit structure of the second quiet control signal generation unit 102 and the utility model the second embodiment is identical, therefore repeats no more.
In the present embodiment, the quiet control end of loud speaker power amplifier 300 and earphone discharge circuit 400 quiet control ends all need by high level as quiet control signal to trigger mute function.
Below in conjunction with operation principle quiet auxiliary control circuit is described further:
When the system for TV set start powers on, the level signal that the universaling I/O port of main control chip 200 is exported is unstable, then the negative electrode of diode D3 can't be exported effective high level, so, the direct current that DC power supply 500 is exported after powering on charges by 7 couples of storage capacitor C3 of resistance R, simultaneously, direct current can be by the negative electrode output of diode D5, and by after resistance R 9 dividing potential drops output one high level make loud speaker power amplifier 300 and earphone discharge circuit 400 all enter mute state as quiet control signal, send the impulsive sound that powers on to avoid loud speaker and earphone.C1 constantly charges along with storage capacitor, can constantly reduce from the electric current of diode D5 output, when storage capacitor C3 charging is finished, the negative electrode of diode D5 stops output current, the first end of resistance R 9 becomes electronegative potential from high potential, and then the quiet control end of the quiet control end of loud speaker power amplifier 300 and earphone discharge circuit 400 all obtains low level and cancels mute function from the first end of resistance R 9, at this moment, television set powers on to start shooting and finishes, and system for TV set begins to enter normal operating conditions.
When system for TV set works, if the user inputs quiet triggering command, then main control chip 200 can be exported a low level from its universaling I/O port, this low level enters the base stage of NPN type triode Q3 by resistance R 5, NPN type triode Q3 cut-off, the direct current of DC power supply 500 outputs exports the first end of resistance R 9 to by resistance R 6 and diode D3, after these direct current process resistance R 9 dividing potential drops, export a high level by the first end of resistance R 9 and make loud speaker power amplifier 300 and earphone discharge circuit 400 all enter mute state as quiet control signal; If the user inputs quiet cancel an order, then main control chip 200 can be exported a high level from its universaling I/O port, this high level enters the base stage of NPN type triode Q3 by resistance R 5, the Q3 conducting of NPN type triode is also drawn electric current by its collector electrode from the first end of resistance R 6, the negative electrode output low level of diode D3 is to the first end of resistance R 9 at this moment, thereby make loud speaker power amplifier 300 and earphone discharge circuit 400 cancel mute function, stop quiet.
When system for TV set shutdown power down, the level signal that the universaling I/O port of main control chip 200 is exported is unstable, then the negative electrode of diode D3 can't be exported effective high level, and DC power supply 500 stops output DC, positive-negative-positive triode Q4 conducting this moment, storage capacitor C3 begins discharge, electric current flow to the first end of resistance R 9 by positive-negative-positive triode Q4 and resistance R 8, then by resistance R 9 dividing potential drops and export a high level from its first end and make loud speaker power amplifier 300 and earphone discharge circuit 400 all enter mute state as quiet control signal, send the power down impulsive sound to avoid loud speaker and earphone.Iterative method along with storage capacitor C3 discharge process, two pole tensions of storage capacitor C3 can progressively reduce, the electric current that then flow to the first end of resistance R 9 by resistance R 8 also can progressively reduce, when storage capacitor C3 discharge finishes, the first end of resistance R 9 also becomes electronegative potential thereupon, so far, the shutdown process of system for TV set also finishes thereupon.
In the present embodiment, can be by the quiet control signal of selecting the resistance R 9 with specific resistance that whole quiet auxiliary control circuit is exported, the level signal that namely exports the quiet control end of the quiet control end of loud speaker power amplifier 300 and earphone discharge circuit 400 to can reach the requirement of system for TV set.
The utility model embodiment also provides a kind of television set, this television set comprises main control chip 200, loud speaker power amplifier 300, earphone discharge circuit 400, DC power supply 500 and quiet auxiliary control circuit 100, quiet auxiliary control circuit 100 is connected with main control chip 200, loud speaker power amplifier 300, earphone discharge circuit 400 and DC power supply 500, and quiet auxiliary control circuit 100 comprises:
The output of power supply termination DC power supply 500, output is connected with the quiet control end of loud speaker power amplifier 300 and the quiet control end of earphone discharge circuit 400 simultaneously, generates the first quiet control signal generation unit 101 of quiet control signal when television set powers on power down;
The output of power supply termination DC power supply 500, input is connected with the universaling I/O port of main control chip 200 and the input of the first quiet control signal generation unit 101 respectively with output, when television set works, generate the second quiet control signal generation unit 102 of corresponding quiet control signal according to the level signal of main control chip 200 outputs.
In the utility model embodiment, the quiet auxiliary control circuit that comprises the first quiet control signal generation unit and the second quiet control signal generation unit by employing, can power at television set, when power down and television set normal operation and user need to realize mute function, stably the output mute control signal is with the quiet control of realization to loud speaker power amplifier and earphone discharge circuit, and the circuit structure of whole quiet auxiliary control circuit is simple, effectively reduce cost, thereby solved the existing circuit structure complexity of mute circuit and the high problem of cost that prior art provides.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. the quiet auxiliary control circuit of a television set is connected with main control chip, loud speaker power amplifier, earphone discharge circuit and the DC power supply of television set, and described quiet auxiliary control circuit comprises:
The output of the described DC power supply of power supply termination, output is connected with the quiet control end of described loud speaker power amplifier and the quiet control end of described earphone discharge circuit simultaneously, generates the first quiet control signal generation unit of quiet control signal when television set powers on power down;
The output of the described DC power supply of power supply termination, input is connected with the universaling I/O port of described main control chip and the input of the described first quiet control signal generation unit respectively with output, when television set works, generate the second quiet control signal generation unit of corresponding quiet control signal according to the level signal of described main control chip output.
2. quiet auxiliary control circuit as claimed in claim 1 is characterized in that, the described first quiet control signal generation unit comprises:
Resistance R 1, positive-negative-positive triode Q1, storage capacitor C1, diode D1, diode D2, resistance R 2, resistance R 3, resistance R 4 and NPN type triode Q2;
The first end of described resistance R 1 is the power end of the described first quiet control signal generation unit, the base stage of described positive-negative-positive triode Q1 connects the first end of described resistance R 1, the emitter of described positive-negative-positive triode Q1 and the second end of described resistance R 1 are connected to the positive pole of described storage capacitor C1 altogether, the negative electrode of the negative pole of described storage capacitor C1 and described diode D1 is connected to the anode of described diode D2 altogether, the plus earth of described diode D1, the negative electrode of described diode D2 is the input of the described first quiet control signal generation unit, described resistance R 2 is connected between the negative electrode of the collector electrode of described positive-negative-positive triode Q1 and described diode D2, the base stage of described NPN type triode Q2 is connected with the negative electrode of described diode D2 and the first end of described resistance R 3 simultaneously, the second end ground connection of described resistance R 3, the grounded emitter of described NPN type triode Q2, the output of current collection the very described first quiet control signal generation unit of described NPN type triode Q2, described resistance R 4 are connected between the collector electrode of the first end of described resistance R 1 and described NPN type triode Q2.
3. quiet auxiliary control circuit as claimed in claim 1 is characterized in that, the described first quiet control signal generation unit comprises:
Resistance R 7, positive-negative-positive triode Q4, storage capacitor C3, diode D4, diode D5, resistance R 8 and resistance R 9;
The first end of described resistance R 7 is the power end of the described first quiet control signal generation unit, the base stage of described positive-negative-positive triode Q4 connects the first end of described resistance R 7, the emitter of described positive-negative-positive triode Q4 and the second end of described resistance R 7 are connected to the positive pole of described storage capacitor C3 altogether, the negative electrode of the negative pole of described storage capacitor C3 and described diode D4 is connected to the anode of described diode D5 altogether, the plus earth of described diode D4, the negative electrode of described diode D5 is the input of the described first quiet control signal generation unit, described resistance R 8 is connected between the negative electrode of the collector electrode of described positive-negative-positive triode Q4 and described diode D4, the first end of described resistance R 9 is the output of the described first quiet control signal generation unit and links to each other the second end ground connection of described resistance R 9 with the negative electrode of described diode D5.
4. quiet auxiliary control circuit as claimed in claim 1 is characterized in that, the described second quiet control signal generation unit comprises:
Resistance R 5, storage capacitor C2, NPN type triode Q3, resistance R 6 and diode D3;
The first end of described resistance R 5 is the input of the described second quiet control signal generation unit, the second end of described resistance R 5 and the positive pole of described storage capacitor C2 are connected to the base stage of described NPN type triode Q3 altogether, the equal ground connection of emitter of the negative pole of described storage capacitor C2 and described NPN type triode Q3, the collector electrode of described NPN type triode Q3 is connected with the first end of described resistance R 6 and the anode of described diode D3 simultaneously, and the second end of described resistance R 6 and the negative electrode of described diode D3 are respectively power end and the output of the described second quiet control signal generation unit.
5. television set, it is characterized in that, described television set comprises main control chip, loud speaker power amplifier, earphone discharge circuit, DC power supply and quiet auxiliary control circuit, described quiet auxiliary control circuit is connected with described main control chip, described loud speaker power amplifier, described earphone discharge circuit and described DC power supply, and described quiet auxiliary control circuit comprises:
The output of the described DC power supply of power supply termination, output is connected with the quiet control end of described loud speaker power amplifier and the quiet control end of described earphone discharge circuit simultaneously, generates the first quiet control signal generation unit of quiet control signal when television set powers on power down;
The output of the described DC power supply of power supply termination, input is connected with the universaling I/O port of described main control chip and the input of the described first quiet control signal generation unit respectively with output, when television set works, generate the second quiet control signal generation unit of corresponding quiet control signal according to the level signal of described main control chip output.
6. television set as claimed in claim 5 is characterized in that, the described first quiet control signal generation unit comprises:
Resistance R 1, positive-negative-positive triode Q1, storage capacitor C1, diode D1, diode D2, resistance R 2, resistance R 3, resistance R 4 and NPN type triode Q2;
The first end of described resistance R 1 is the power end of the described first quiet control signal generation unit, the base stage of described positive-negative-positive triode Q1 connects the first end of described resistance R 1, the emitter of described positive-negative-positive triode Q1 and the second end of described resistance R 1 are connected to the positive pole of described storage capacitor C1 altogether, the negative electrode of the negative pole of described storage capacitor C1 and described diode D1 is connected to the anode of described diode D2 altogether, the plus earth of described diode D1, the negative electrode of described diode D2 is the input of the described first quiet control signal generation unit, described resistance R 2 is connected between the negative electrode of the collector electrode of described positive-negative-positive triode Q1 and described diode D2, the base stage of described NPN type triode Q2 is connected with the negative electrode of described diode D2 and the first end of described resistance R 3 simultaneously, the second end ground connection of described resistance R 3, the grounded emitter of described NPN type triode Q2, the output of current collection the very described first quiet control signal generation unit of described NPN type triode Q2, described resistance R 4 are connected between the collector electrode of the first end of described resistance R 1 and described NPN type triode Q2.
7. television set as claimed in claim 5 is characterized in that, the described first quiet control signal generation unit comprises:
Resistance R 7, positive-negative-positive triode Q4, storage capacitor C3, diode D4, diode D5, resistance R 8 and resistance R 9;
The first end of described resistance R 7 is the power end of the described first quiet control signal generation unit, the base stage of described positive-negative-positive triode Q4 connects the first end of described resistance R 7, the emitter of described positive-negative-positive triode Q4 and the second end of described resistance R 7 are connected to the positive pole of described storage capacitor C3 altogether, the negative electrode of the negative pole of described storage capacitor C3 and described diode D4 is connected to the anode of described diode D5 altogether, the plus earth of described diode D4, the negative electrode of described diode D5 is the input of the described first quiet control signal generation unit, described resistance R 8 is connected between the negative electrode of the collector electrode of described positive-negative-positive triode Q4 and described diode D4, the first end of described resistance R 9 is the output of the described first quiet control signal generation unit and links to each other the second end ground connection of described resistance R 9 with the negative electrode of described diode D5.
8. television set as claimed in claim 5 is characterized in that, the described second quiet control signal generation unit comprises:
Resistance R 5, storage capacitor C2, NPN type triode Q3, resistance R 6 and diode D3;
The first end of described resistance R 5 is the input of the described second quiet control signal generation unit, the second end of described resistance R 5 and the positive pole of described storage capacitor C2 are connected to the base stage of described NPN type triode Q3 altogether, the equal ground connection of emitter of the negative pole of described storage capacitor C2 and described NPN type triode Q3, the collector electrode of described NPN type triode Q3 is connected with the first end of described resistance R 6 and the anode of described diode D3 simultaneously, and the second end of described resistance R 6 and the negative electrode of described diode D3 are respectively power end and the output of the described second quiet control signal generation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220165606 CN202652374U (en) | 2012-04-18 | 2012-04-18 | Television and mute auxiliary control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220165606 CN202652374U (en) | 2012-04-18 | 2012-04-18 | Television and mute auxiliary control circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202652374U true CN202652374U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220165606 Expired - Lifetime CN202652374U (en) | 2012-04-18 | 2012-04-18 | Television and mute auxiliary control circuit thereof |
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| CN (1) | CN202652374U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017121110A1 (en) * | 2016-01-13 | 2017-07-20 | 吉林航盛电子有限公司 | Pedestrian sound warning device having active early-warning function for use in new-energy vehicle |
| CN110677778A (en) * | 2019-10-10 | 2020-01-10 | 深圳市九洲电器有限公司 | Audio mute control circuit and electronic equipment |
| CN115103272A (en) * | 2022-08-24 | 2022-09-23 | 上海芯龙半导体技术股份有限公司南京分公司 | Mute control method, audio power amplifier circuit and audio power amplifier chip |
-
2012
- 2012-04-18 CN CN 201220165606 patent/CN202652374U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017121110A1 (en) * | 2016-01-13 | 2017-07-20 | 吉林航盛电子有限公司 | Pedestrian sound warning device having active early-warning function for use in new-energy vehicle |
| CN110677778A (en) * | 2019-10-10 | 2020-01-10 | 深圳市九洲电器有限公司 | Audio mute control circuit and electronic equipment |
| CN110677778B (en) * | 2019-10-10 | 2020-12-18 | 深圳市九洲电器有限公司 | Audio mute control circuit and electronic equipment |
| CN115103272A (en) * | 2022-08-24 | 2022-09-23 | 上海芯龙半导体技术股份有限公司南京分公司 | Mute control method, audio power amplifier circuit and audio power amplifier chip |
| CN115103272B (en) * | 2022-08-24 | 2022-12-02 | 上海芯龙半导体技术股份有限公司南京分公司 | Mute control method, audio power amplifier circuit and audio power amplifier chip |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
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| CX01 | Expiry of patent term |